volume_mute
A BA is performing 'Interface Analysis'. If a system has 5 external interfaces and each interface has a 5% chance of failure daily, what is the probability that at least one interface fails on any given day? (Rounded)
publish date: 2026/03/09 05:22:37.940305 UTC
volume_mute
Correct Answer
23%
Explanation
Probability of no failures =\(0.95^5\) = 0.773.
Probability of at least on failure = 1 - 0.773 = 0.226 or 23%
Reference
go-math-science.com